Improvement in bobbin-winders for sewimg-iviachimes



A. C. CAREY.

BOBBIN-WINDERS' FOR SEWING-MACHINES. 1101863709, Patented Jan.30,1 877.

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Unrrna ererns AUGUSTUS O. CAREY, OF MADDEN, MASSACHUSETTS.

IMPROVEMENT IN BOBBIN-WINDERS FOR SEWING-MACHINES.

Specification forming part of Letters Patent No. 186,741-9, datedJanuary 30, 1877 application filed January 10, 1877.

i To all whom it may concern:

'scribed, to prevent a coil of thread being wound from overriding a coiljust wound and adjacentthereto; also, in the combination, with arotating spindle and pressure-pad, ofa threadcontrolling guide-wireconnected with the pressure-pad, and moving with it away from the axisof the bobbin or spool being wound.

Figure 1 represents one form of the invention as embodied in onewell-known bobbinwinding attachmentin use in connection withsewingmachines. Fig. 2 is a section thereof on the line mm, Fig. 1; andFig. 3an under-side and an edge view of the pressure-pad. Fig. 4 showsthe pad without corrugations.

Machine-wound thread, as found on commercial spools, is laid uniformlyand evenly in layers from end to end of the spool, and such thread, whenusedin machine-sewing, unwinds uniformly. Thread, as commonly wound fromcommercial spools upon small bobbins for use in sewing-machine shuttles,is guided by hand and wound very unevenly, the coils override eachother, the layers of thread do not extend evenly from end to end. of thebobbin, the surface of the thread is left irregular, and, being woundirregularly, less thread is wound upon the bobbin than would be the caseif evenly wound. Thread so imperfectly wound cannot be delivered fromthe shuttle at a uniform tension, as is necessary for the best sewingand stitch.

To obviate this bad hand-winding, and consequent imperfections insewing, numerous devices have been contrived to be applied tosewing-machines. To obviate this evil of unequal draft fromimperfectly-wound bobbins, it

has been attempted to wind small shuttle-bob:

bins of wood in regular thread-winding machines, such'wonnd bobbinsbeing used in the shuttle instead of the usual metallic bobbins, filled,as needed, by the usual bobbin-winder of the sewing-machine.

I have ascertained, by experiment, that the thread being wound shouldmeet the bobbin or the surface of thread thereon immediately at orjustin advance of the point in the direction of andin line with the axis ofthe bobbin, at which the front of the pressure-pad meets the layers ofthread already wound.

The threadcontrolling guide wire, from which the thread extends as atangent to the bobbin, should also vary its position with relation tothe axis of the bobbin as it, wound with thread, increases in size, asthereby the thread is always delivered upon the bobbinsurface at auniform position with relation to the pressing portion of the pad.

In the drawing, the body a of the bobbinwinding device representedis'that employed on the Wilson shuttle machine. The spindle b is rotatedthrough the action of a balance or fly wheel on the rubbercovered roller0. One end of the bobbin d enters a cavity at the end of spindle b, andthejournal at the other end enters a proper spring-pressed centeringdevice, 0, the bobbin being thereby held so as to be rotated in unisonwith the shaft b. The pressure-pad f, pivoted at g, is pressed down uponthe bobbin. by a spring, h; and connected with the pad is athread-controlling guide-wire, 7;, about which the thread is passed overor wound one or more times, as shown in Fig. 1, preparatory to itspassage to the bobbin. The hole at the rear end of the pad, to receivethe pin 9, is so enlarged with reference to the diameter of the pin thatthe pad, besides rising with the thread as it is wound on the bobbin,can also move a little longitudinally in the direction in which coilsare to travel, as the threadon reaching the end of the bobbin shifts itsdirection of movement, and also so that the pad can rock to adapt itselfto the new and old layers on which it rests part of the time. The frontof the pad is rounded, as are its ends, and the under surface is scored,notched, or corrugated diagonally and in reverse directions, as in Fig.3.

These notches extend in opposite directions to operate on the thread asit travels from right to left, or vice versa.

When, for any reason, the thread of the coil being wound attempts tooverride an adjacent coil already wound, the portion of the coil soraised or elevated above the surface of the adjacent layers willbecaughtin one of the grooves and thrown off into its proper position.The thread being wound and extending to the bobbin touches the bobbin orcylindrical surface of wound thread just in advance of the rounded frontportion of the pad, and, consequently, when the thread is being properlyand evenly wound the single tangential strand cannot enter either of thediagonal grooves, butif the strand overrides an adjacent wound coil,then it, raised from its proper position, enters a groove at the frontof the pad, and is immeditely thrown down to its proper position. Whenthe thread completes a cylindrical layer from head to head of thebobbin, the strand extendin gfrom the guide-wire strikes the bobbin-headand is immediately reversed, and as theloop of thread changes thedirection of its movement along the guide-wire thepresser-pad also movesa little in the same direction. This pad, under the action of themovingstrand of thread, is pressed constantly in the direction ofmovement of the coils, which also tends to prevent overriding of thecoils.

The rounded ends of the pad permit the thread to override at the ends ofthe bobbin so as to commence a new layer in a reverse direction, and tofacilitate the passage of the thread under the pad. The spring h pressesupon the center of the pad, and the pad, pivoted as before described, istherefore permitted to rock so as to adapt itself to the surface.

of the bobbin composed of the new layer being wound and an old layeralready wound,

wound, need not be directed or moved by hand along the guide-wire. Thethread held at a point within the plane of the heads, or substantiallycentral with relation to the bobbins length, may pass directly from aspool of commerce to or about the guide-wire, and the strand being laidacting against the adjacent wound layer will cause the loop of threadabout .the guide-wire to travel from end to end of such wire, and themovement of the thread along the wire will be automatically reversed, asabove described.

If desired, the thread may extend around the pulley Z, arranged to turnfreely about and slide longitudinally upon the guide-wire. The shape ofthe bobbin-winding frame may be changed without departing from thisinvention, and may be of the usual shapes applied to any of thewell-known sewing-machines.

I claim 1. The combination, with a rotating shaft, of a pressure-padgrooved or corrugated diagonally upon its under surface to press uponthe surface of the thread of the bobbin, being wound to operate as andfor the purpose set forth.

2. A pressure-pad, in combination with the thread-controlling guide-wireattached to it, and. adapted to rise and fall with the pad,

substantially as described.

3. The combination, with the grooved pressure-pad of thethread-controlling guide-wire,

substantially as described.

4.. A rotating shaft, in combination with a pressure-pad pivoted asdescribed, rounded at its front and ends, and adapted to move at itsforward end in the direction of the length of the bobbin, and to rock toadapt itself to the new and old layers of thread on the bobbinsurface,substantially as set forth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

AUGUSTUS G. CAREY.

Witnesses W. M. PARKER, A. K. T. RoUNsEvILLE.

